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EC number: 931-125-7
CAS number: -
Nutrients were more abundant in static ponds than in flow-through ponds,
producing more phytoplankton, but less macrophytes.
There were no qualitative or quantitative differences between
SASIL-treated and control ponds of both types concerning phytoplankton
(14 species studied). The Shannon diversity index for phytoplankton did
not differ from the untreated controls. However, species diversity was
greater in the static ponds. Development of macrophytes was strongest in
the SASIL-treated flow-through pond (80% covered), whereas weight gain
of fish (carp) was slightly less compared to control or static ponds,
probably due to dense plant growth. No differences concerning
macrophytes or fish were found in treated and control static ponds.
No differences were observed in heavy metal contents of treated and
control ponds. Sasil was found in the upper layers (0-5 cm) of the
Effects in streams:
No significant differences concerning degradation of organic substances
(measured as BOD, COD or organic C) and the biocoenoses between
SASIL-treated and untreated streams were found. There was a slight
increase in the saproby index of the SASIL-treated stream. In the test
with sewage-effluent, also no significant
differences between treated and untreated streams was observed
concerning degradation of organic substances and biocoenotic changes
(esp. zoobenthos was quantitatively studied). Sasil was settled off the
streams for 80-90%, the rest stayed in the sediment (60-240 mg/kg d.w.
after some months).
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